Leonard young



L. YOUNG. Tool-Holder for Grindstones,

(No Model.)

No. 228,849. Patented June15,l880.

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ing manner across the periphery of the same.

UNITED STATES ATENT Orrrcn.

LEONARD YOUNG, OF SING SING, ASSIGNOR OF ONE-HALF OF HIS RIGHT TO NELSON LYON, OF ALBANY, NEW YORK.

TOOL-HOLDER FO SPECIFICATION forming part of Letters Patent No. 228,849, dated June 15, 1880.

Application filed April 13, 1880.

To all whom it may concern:

Be it known that I, LEONARD YOUNG, of Sing Sing, county of Westchester, and State of New York, have invented new and useful Improvements in Tool Holders for Grindstones, of which the following is a specification.

My invention relates to improvements in tool-holders for grindstones in which a head, carrying stationary and movable clampingjaws, is hinged or jointed with a horizontal cylindrical shaft swiveled in a horizontal sleeve attached to a vertical shaft swiveled from a sleeve fixed in or to the frame of the grindstone; and the objects of my improvements are, first, to provide a tool-holder in which the movable clamping piece for holding a tool will be positively guided in its movement in a direction at right .ngles with the horizontal plane of the stationary clamping-bars and be held; second, to secure the tool holder in a clamped manner from trunnions on which the tool-holder will be oscillated or turned, and also effect a hinged connection of the said toolholder with a swiveled horizontal arm, by which the tool-holder may be made to hold the tool at any desired angle in relation to the stone; third, to securely clamp the tool-holder in various positions set to as it may be swungfrom its end trunnions fourth, to secure to the toolholder a vertical vibrating movement to and from the stone from a point distant from the same, and also a transverse vibrating movement obliquely to the axis of the stone. 1 attain these objects by the mechanism illustrated in the accompanying drawings, in which- Figure 1 represents a horizontal view of the device from above. Fig. 2 is a sectional elevation of the same. Fig. 3 is a front view of the tool-holder; and Fig. 4 is a view of a modification of the device, whereby the tool-holder may be made to carry the tool in a reciprocat- Similar letters refer to similar parts throughout the several views.

In the drawings, A represents a section of a frame of a grindstone, B. Secured to said frame is the sleeve 0, provided with a setscrew, to, as shown.

Working in sleeve 0 is the standard D,

(No model.)

which standard is adapted to be raised or lowered as may be required by reason of the diameter of the stone the implement is to be employed with, and secured by setscrew a. The standard D is made of steam or gas pipe or tubing, and has secured to its upper end the T-e0upling piece or head E, the cross portion of which head forms sleeve b. The said sleeve is provided with one or more setscrews, 0. Working nicely in sleeve bis the horizontal swivel-arm F, which arm is made of steam or. gas pipe or tubing, and is adapted to be moved lengthwise in either direction in said sleeve and be turned therein and secured by the said set-screw.

Secured to one end of the swivel-arm F is the cross-head G, from which cross-head are pivoted the arms H H, secured by bolt 0?, passing through said arms and cross-head, and secured by the set-nut e, as shown by full and dotted lines in Fig. 1 and by full lines in Fig.

2. Secured between the forward ends of arms H H by the clamping-boltf and hand-nut g is the tool-holder J, which tool-holder is suspended between arms H H by trunnions h h, (shown by dotted lines in Figs. 1,3, and4,) made with the ends of said holder and working in holes madeinthe ends ofsaid arms H. Thetool-holder being thus suspended is rendered capable of being oscillated in its trunnions h, and also from the bolt (1, connecting arms H H with the cross-head G of the swivel-arm E. The said tool-holder may also be securely clamped between the arms H H, so as not to oscillate, by simply tightening the hand-nut g on boltf, so as to tightly draw the outer ends of arms H H against the ends of said tool-holder.

The tool-holder J is composed of the stationary clamping-bars 'm m, running parallel with each other and connecting with the end 0 portions, '11. n, at the lower edges. A yoke, 0, above, extending from end to end, strengthens the connection of the clamping-bars m m with the end parts of the tool-holder. Made on the inner sides of the end portions, 42 n, are the 5 vertical slot form of recessed ways 8 s, which receive the end portions of the movable clamping-piece p p, which clamping-piece carries on its lower bar' the clamping-jaws q g, which clamping-jaws extend forward and work beneath the foremost clamping-jaw, m, of the stationary portions of the tool holder. A draw-bolt, 1', provided with a hand-nut working with the upper bar of the clamping-piece and the yoke 0, operates to draw the clampingjaws q q upward toward the clamping-bars m, or force them down from the same, as may be required.

In cases where it is desirable to grind or sharpen pieces of considerable length such as tobacco-knives, planing-machine knives. and the like-I employ between the arms H H and the cross-head Gr of the swivel-arm parallel cylindrical bars L L, yoked together at their outer ends, as shown in Fig. 4, in which form of construction the bar L is made to work in the cross-head G and can be set by a set-screw, z, (shown by dotted lines in said figure,)while the bar L works in the rearward ends of arms H H and in sleeve G, placed between said arms, as shown. By this arrangement the tool-holder may be vibrated to and from the stone, and also be set to any desired incline in relation to the axis of the stone, While at the same time the tool-holder, with the tool fixed therein, will be rendered capable of being moved in a reciprocating manner in direction. of arms 1 and 2 in Fig. 4, so as to carry along knife across-the stone from end to end. If selected, set-collars M and N, provided with setscrews t t, are employed to secure the swivelarm F from being movedin either direction in the head E of the standard D.

The manner in which the parts of this improved device for holding tools for grinding operates is as follows The operator will clamp the tool to be ground between the clamping-bars m and the movable clamping-jaws attached to the clamping-piece p p, and secure the same by the hand-nut of the bolt 1'. In this operation the recessed ways 8 5-, made in the end pieces of the tool-holder, will guide the clamping-jaws q q, bearing uniformly against the lower side of the tool T, and the clampingbars m m, bearing uniformly against the upper sides of the same.

The tool-holder, being held from its end trunnions, h h, by the arms H H and bolt f and nut g, is rendered capable of being variously adjusted, so as to give to the clamped tool any desired incline, so that the tool may be sharpened with any degree of angle of incline selected; and being hinged to the cross-head G by the arms H H, the toolholder may be vibrated in either direction toward or from the stone,while the tool will be permitted to be pressed downward on the same.

The swivel-arm F, carrying the cross-head Gr and tool-holder, being capable of being turned in the head E of the standard D, allows the tool-holder to be turned to any degree of incline in the direction of its length and in relation to the horizontal line of the axis of the stone, so as to hold the tool inclined,while the standard D, working in the sleeve G, secured to the frame of the stone, operates as a means by which the tool-holder may be oscillated in opposite directions across the stone and carry the tool from end to end, back and forth, over the periphery of the stone.

These devices are simple and not liable to get out of order, and may be readily operated by an adult or youth, and are adapted to so hold a tool in relation to the stone as to secure a uniformity of angle of edge to the tool as may be selected, as also to permit of a change of the angle when desired. I

Having described my invention, what I claim, and desire to secure by Letters Patent, is-- 1. The tool-holder J, formed by the combination, with the stationary clamping-bars m m, end portions, a a, provided with recessed ways ,9 s, and yoke 0, of the clamping-piece p 12, carrying clamping-jaws q q, and draw-bolt r, substantially as and for the purpose set forth.

2. The combination, with the arms H H, pivoted to the swivel-arm F, of the tool-holder J, held by trunnions h in the ends of said pivoted arms, substantially as and for the pun pose set forth.

3. The combination, with the tool-holder J, provided with trunnions h, and arms H H, pivoted with the swivel-arm F, of the clamping-boltf and nut g, substantially as and for the purpose set forth.

4. The combination, with the standard D, capable of being raised or lowered and provided with sleeve 5 and set-screw, and the swivel-arm F, working in said sleeve, of a toolholder, J, arranged to oscillate between arms H H, pivoted to said several arms, substantially as and for the purpose set forth.

LEONARD YOUNG.

Witnesses:

CHARLES SELKIRK, RICHARD P. DUMARY. 

